Multi-Color Balance For Color Constancy

In this paper, we propose a novel multi-color balance adjustment for color constancy. The proposed method, called ``n-color balancing,'' allows us not only to perfectly correct n target colors on the basis of corresponding ground truth colors but also to correct colors other than the n colors. In contrast, although white-balancing can perfectly adjust white, colors other than white are not considered in the framework of white-balancing in general. In an experiment, the proposed multi-color balancing is demonstrated to outperform both conventional white and multi-color balance adjustments including Bradford's model.